Digital Currency Expansion explores the rapidly evolving world of digital currencies, including cryptocurrencies and central bank digital currencies (CBDCs), and their potential to reshape global finance. The book addresses how these innovations impact traditional banking systems and monetary policy, specifically inflation management. For instance, the emergence of decentralized finance (DeFi) challenges established financial institutions and regulatory frameworks. The book argues that the widespread adoption of digital currencies necessitates a fundamental rethinking of economic models. While offering benefits like increased financial inclusion, they also introduce risks to financial stability and cybersecurity. The analysis progresses from defining key concepts like blockchain technology to examining the impact of digital assets on banking, inflation, and global financial systems. Case studies of countries experimenting with CBDCs add practical context. This book provides a comprehensive overview of the field, making it valuable for policymakers, financial professionals, and anyone interested in understanding the future of money. It adopts an analytical, forward-looking approach, offering insights into potential trends and challenges in the digital currency landscape.